# 画圆
import pygame, sys
from pygame.locals import *

pygame.init()

screen = pygame.display.set_mode((600, 500))

pygame.display.set_caption("Drawing Circles")

while True:
    for event in pygame.event.get():
        if event.type in (QUIT, KEYDOWN):
            sys.exit()

    screen.fill((0, 0, 200))

    color = (255, 255, 0)
    position = (300, 250)
    radius = 100
    width = 10

    pygame.draw.circle(screen, color, position, radius, width)

    pygame.display.update()